APA (7th ed.) Citation

Halstead, L. (1968). The pattern of vertebrate evolution. Freeman.

Chicago Style (17th ed.) Citation

Halstead, L.B. The Pattern of Vertebrate Evolution. San Francisco, Calif: Freeman, 1968.

MLA (9th ed.) Citation

Halstead, L.B. The Pattern of Vertebrate Evolution. Freeman, 1968.

Warning: These citations may not always be 100% accurate.